77124-01-7Relevant academic research and scientific papers
Multifunctional 2- and 3-Fluoropyrroles
Heeran, Darren,Sandford, Graham
supporting information, p. 2339 - 2343 (2019/02/27)
Sequential reaction cascades for the synthesis of polysubstituted 2- and 3-fluoropyrrole derivatives from common polybromopyrrole precursors have been developed. A strategic variation of a combination of regioselective debromolithiation followed by trapping of the corresponding carbanions by electrophilic fluorination and Pd catalysed cross-coupling reactions allows access to polyfunctional fluoropyrrole products by methodology applicable to drug discovery programs, extending the range of five-membered fluoroazaheteroaromatic derivatives potentially available for incorporation into screening libraries.
Bromination and Chlorination of Pyrrole and Some Reactive 1-Substituted Pyrroles
Gilow, H. M.,Burton, D. Edward
, p. 2221 - 2225 (2007/10/02)
Monobromination of pyrrole and 1-methyl-, 1-benzyl-, and 1-phenylpyrrole with 1 mol of N-bromosuccinimide in tetrahydrofuran results in the regiospecific formation of the 2-bromopyrroles.A little disubstitution is observed.Similarly, brominations with 2, 3, or 4 mol of NBS form primarily the di-, tri-, and tetrabromopyrroles, respectively.The thermodynamically more stable 3-bromopyrroles are the major monobrominated products observed when bromine is used as the brominating agent due to isomerization of the 2-bromopyrroles with hydrogen bromide.These reaction mixtures are further complicated because of disproportionation reactions.Chlorination with N-chlorosuccinimide gave results similar to those for the bromination with NBS, but the reaction is not as selective.
